// Copyright (C) 2017 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package severity

import "github.com/google/gapid/core/text/note"

type (
	// Splits is a map of severity level to note handler, used by the Split function.
	Splits map[Level]note.Handler
)

// Split returns a handler that splits incoming pages based on their severity level.
// Pages are sent to the handler that matches the note level, if one is in the
// override map, otherwise they are sent to the normal handler.
func Split(normal note.Handler, override Splits) note.Handler {
	return func(page note.Page) error {
		level := FindLevel(page)
		if handler, found := override[level]; found {
			return handler(page)
		}
		return normal(page)
	}
}
